Near dusk the power in Ond and Nektar’s house went out. Ond was on that in a flash. He had a gasoline-powered electrical generator ready in their big detached garage, plus gallons and gallons of fuel. He fired the thing up to keep, above all, his home’s air filters and wireless antennas running. He’d tweaked his antennas to produce a frequency that supposedly the nants couldn’t bear.

Chu was oddly unconcerned with the apocalypse. He was busy, busy, busy studying Ond’s pages of code. He’d become obsessed with the challenge of learning every single block of symbols.

By suppertime, the red, ported zone had begun eating into the Dolores Heights neighborhood where Ond and Nektar lived in the fine big house that the Nantel stock options had paid for. Ond lent their downhill neighbors—Willy’s parents—an extra wireless network antenna to drive off the nants, and let them run an extension cord to Ond’s generator. President Dibbs’s face gloated and leered from the sky.

“02A1B59F, 9812D007, 70FFDEF6,” said Chu when Nektar went to tuck him in that night. He had Ond’s sheaf of pages with a flashlight under his blanket.

“Give me that,” said Nektar, trying to take the pages away from him.

“Daddy!” screamed Chu, a word he’d never used before. “Stop her! I’m not done!”

Ond came in and made Nektar leave the boy alone. “It’s good if he learns the code,” said Ond, smoothing Chu’s chestnut cap of hair. “This way there’s a chance that—never mind.”

When Nektar and Ond awoke next morning, the house next door was gone.

“Maybe he set up the antenna wrong,” said Ond.

“All their bushes and plants were eaten, too,” said Nektar, standing by the window. “All the neighbors are gone. And the trees. Look out there. It’s a wasteland. Oh God, Ond, we’re going to die. Poor Gaia.”

As far as the eye could see, the pastel chockablock city of San Francisco had been reduced to bare dirt. It looked like the pictures of the town after the 1906 earthquake. And instead of smoke, the air was glittering with hordes of freshly made nants, a seething fog of omnivorous, pullulating death-in-life. Right now the nants were staying away from Ond and Nektar’s house on the hill. But the gasoline supplies for the generator wouldn’t last forever. And in any case, before long the nants would be undermining the house’s foundation.

Chu was in the video room watching a screen showing his friend Willy. Chu had thought to plug the video into an extension cord leading to the generator. Ond’s dog-eared pages of code lay discarded on the floor.